If the app displays you the "No connection" screen, try to do the following: 

1. Check that the internet connection is working by loading a website in your browser.
2. It's possible that some ports that our app needs are blocked by the firewall of the network you're connected to. It usually happens on public WiFi, such as in hotels, etc. Our app needs the following ports: TCP port 5222 for audio, TCP port 443 for the video. In addition, the app also requires these ports for the video: UDP port 3478, UDP ports 1025 - 65535 (media ports). A network administrator or cellular data provider should assist you with this issue. 
3. We try to make sure the app works under all circumstances, however, on rare occasions (such as server maintenance), the app servers may not be working for a few moments. You can check if the servers are working on this website: https://status.barkio.com/